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Asoc: lpass-cdc: Synchronize lpass-cdc register macro function

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lpass_cdc_register_macro can be called simultaneously by different
macros as bootup resulting in inconsistent value of
num_macros_registered. This will result in one of macro going ahead and
registering lpass-cdc component and other macro failing to register which
will cause probe of other macro to fail. Protect function with mutex lock
so that macros access it sequentially

Change-Id: I9d3811eeceb06b6a7e66d79a1b899b2c4283bb52
Signed-off-by: Yuhui Zhao <quic_yuhuzhao@quicinc.com>
This commit is contained in:
Yuhui Zhao
2022-11-01 15:24:40 +08:00
parent 6b5e8148d4
commit b78dc76483
2 changed files with 7 additions and 0 deletions
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6
asoc/codecs/lpass-cdc/lpass-cdc.c
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@@ -663,6 +663,7 @@ int lpass_cdc_register_macro(struct device *dev, u16 macro_id,
if (macro_id == VA_MACRO)
priv->macro_params[macro_id].reg_wake_irq =
ops->reg_wake_irq;
mutex_lock(&priv->macro_lock);
priv->num_dais += ops->num_dais;
priv->num_macros_registered++;
priv->macros_supported[macro_id] = true;
@@ -673,6 +674,7 @@ int lpass_cdc_register_macro(struct device *dev, u16 macro_id,
ret = lpass_cdc_copy_dais_from_macro(priv);
if (ret < 0) {
dev_err(dev, "%s: copy_dais failed\n", __func__);
mutex_unlock(&priv->macro_lock);
return ret;
}
if (priv->macros_supported[TX_MACRO] == false) {
@@ -685,9 +687,11 @@ int lpass_cdc_register_macro(struct device *dev, u16 macro_id,
priv->lpass_cdc_dais, priv->num_dais);
if (ret < 0) {
dev_err(dev, "%s: register codec failed\n", __func__);
mutex_unlock(&priv->macro_lock);
return ret;
}
}
mutex_unlock(&priv->macro_lock);
return 0;
}
EXPORT_SYMBOL(lpass_cdc_register_macro);
@@ -1353,6 +1357,7 @@ static int lpass_cdc_probe(struct platform_device *pdev)
priv->core_audio_vote_count = 0;
dev_set_drvdata(&pdev->dev, priv);
mutex_init(&priv->macro_lock);
mutex_init(&priv->io_lock);
mutex_init(&priv->clk_lock);
mutex_init(&priv->vote_lock);
@@ -1393,6 +1398,7 @@ static int lpass_cdc_remove(struct platform_device *pdev)
return -EINVAL;
of_platform_depopulate(&pdev->dev);
mutex_destroy(&priv->macro_lock);
mutex_destroy(&priv->io_lock);
mutex_destroy(&priv->clk_lock);
mutex_destroy(&priv->vote_lock);